Move the metadata constructors back to 2.5 syntax.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77733 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/VMCore/Metadata.cpp b/lib/VMCore/Metadata.cpp
index 48db0b4f0b..bf0611f9e4 100644
--- a/lib/VMCore/Metadata.cpp
+++ b/lib/VMCore/Metadata.cpp
@@ -11,12 +11,29 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "LLVMContextImpl.h"
 #include "llvm/Metadata.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "SymbolTableListTraitsImpl.h"
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
+//MDString implementation
+//
+MDString *MDString::get(LLVMContext &Context, const StringRef &Str) {
+  LLVMContextImpl *pImpl = Context.pImpl;
+  sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
+  StringMapEntry<MDString *> &Entry = 
+    pImpl->MDStringCache.GetOrCreateValue(Str);
+  MDString *&S = Entry.getValue();
+  if (!S) S = new MDString(Entry.getKeyData(),
+                           Entry.getKeyLength());
+
+  return S;
+}
+
+//===----------------------------------------------------------------------===//
 //MDNode implementation
 //
 MDNode::MDNode(Value*const* Vals, unsigned NumVals)
@@ -30,6 +47,30 @@ void MDNode::Profile(FoldingSetNodeID &ID) const {
     ID.AddPointer(*I);
 }
 
+MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) {
+  LLVMContextImpl *pImpl = Context.pImpl;
+  FoldingSetNodeID ID;
+  for (unsigned i = 0; i != NumVals; ++i)
+    ID.AddPointer(Vals[i]);
+
+  pImpl->ConstantsLock.reader_acquire();
+  void *InsertPoint;
+  MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
+  pImpl->ConstantsLock.reader_release();
+  
+  if (!N) {
+    sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
+    N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
+    if (!N) {
+      // InsertPoint will have been set by the FindNodeOrInsertPos call.
+      N = new MDNode(Vals, NumVals);
+      pImpl->MDNodeSet.InsertNode(N, InsertPoint);
+    }
+  }
+
+  return N;
+}
+
 //===----------------------------------------------------------------------===//
 //NamedMDNode implementation
 //